944 DME Project
- Thread starter barks944
- Start date
I'd have a look but the software is on my laptop which is currently in Manchester with my brother. It's somehow locked to the specific PC as well which is a little annoying. I remember it having a list of hex codes that selected the different maps, those hex codes might well be the map locations but I'm not sure.
Yes, you really need real time monitoring or datalogging. I can datalog via the box that runs my MAP conversion but it's a bit slow and I'm limited to how many other variables I can get in/out. eg Along with RPM, Boost, Airflow voltage and MAP cell, I can also get AFR, or knock, or exhaust back pressure say - but not all at the same time.
You also need to know where the tables are in the .bin file and how they work. I have the main ones for tuning down, but I'd like all of them just for interest and to improve my understanding of how the DME works.
They are both 2 pin sockets and are just in the loom that comes off the DME - or should be ; I can only find the RCP socket on mine.
If they are both empty, then MAP1 is selected.
If one of either the Region Coding Plug (RCP) or the Impedance Adapter (IA) is fitted then MAP2 is selected.
If they are both fitted then MAP3 is selected.
As far as I am aware, there are just 6 maps in each set - timing and fuel for idle, part throttle and WOT - and all the other maps are used no matter what, and are used in conjuction with these 6 maps.
However, I am by no means an expert in these matters and I don't pretend to fully understand all the workings of the DME!
If they are both empty, then MAP1 is selected.
If one of either the Region Coding Plug (RCP) or the Impedance Adapter (IA) is fitted then MAP2 is selected.
If they are both fitted then MAP3 is selected.
As far as I am aware, there are just 6 maps in each set - timing and fuel for idle, part throttle and WOT - and all the other maps are used no matter what, and are used in conjuction with these 6 maps.
However, I am by no means an expert in these matters and I don't pretend to fully understand all the workings of the DME!
Got a little test PCB made up to test the design for the boost control circuits. Really pleased with how it performed 
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http://www.youtube.com/watch?v=84HN9boebrw&feature=player_profilepage
Things are really moving forwards now, should have the first PCB's for testing in the next month or so.
.http://www.youtube.com/watch?v=84HN9boebrw&feature=player_profilepage
Things are really moving forwards now, should have the first PCB's for testing in the next month or so.
Right making the final changes to the circuit diagrams now. This will be an upgrade for my Lux primarily but also a test bed for lots of nice features for my Turbo. Almost definately final feature list:
*Plug and play replacement for digital board in ML3.1 dme.
*Fits perfectly inside the original DME
*No modifications to wiring loom
*Factory quality installation.
*Exactly the same dimensions as the original board
*Modern high speed microprocessor
*Supports all original sensors inc crank and cam VR sensors
*Supports on board/external MAP sensor
*Supports PWM/Voltage output type MAF sensors without requiring external 12V power
*Supports replacement of switch based throttle sensor with true potentiometer throttle sensor
*Supports additional external analogue input e.g WB02
*Supports all the standard outputs
*Supports wasted spark output
*Support water injection output
*Support 2 relay outputs
*Can take the road speed input from the gearbox
*Can measure knock test signal output from KLR to detect individual knock events.
*Supports two external switches e.g. boost/fuel settings
*On board electronic boost control solenoid
*Supports the measurement of a K-type thermocouple for EGT monitoring
*Modular comms interface that can support bluetooth/USB/radio/OBD2 interfaces
*Provision for traction control module to take opto isolated signals from ABS system.
The software can then be written to take advantage of all these features. I will be writing a laptop based control/datalogging interface for tuning etc. Also will use bluetooth to support mobile phone apps for datalogging and some basic control such as fuel map selection etc.
Thats probably it.
*Plug and play replacement for digital board in ML3.1 dme.
*Fits perfectly inside the original DME
*No modifications to wiring loom
*Factory quality installation.
*Exactly the same dimensions as the original board
*Modern high speed microprocessor
*Supports all original sensors inc crank and cam VR sensors
*Supports on board/external MAP sensor
*Supports PWM/Voltage output type MAF sensors without requiring external 12V power
*Supports replacement of switch based throttle sensor with true potentiometer throttle sensor
*Supports additional external analogue input e.g WB02
*Supports all the standard outputs
*Supports wasted spark output
*Support water injection output
*Support 2 relay outputs
*Can take the road speed input from the gearbox
*Can measure knock test signal output from KLR to detect individual knock events.
*Supports two external switches e.g. boost/fuel settings
*On board electronic boost control solenoid
*Supports the measurement of a K-type thermocouple for EGT monitoring
*Modular comms interface that can support bluetooth/USB/radio/OBD2 interfaces
*Provision for traction control module to take opto isolated signals from ABS system.
The software can then be written to take advantage of all these features. I will be writing a laptop based control/datalogging interface for tuning etc. Also will use bluetooth to support mobile phone apps for datalogging and some basic control such as fuel map selection etc.
Thats probably it
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